The idea of being so called "Cute" depends on how charming others find you, isn't it not? Physical attributes is only half of it; while, the other half would be based on ones personality. It would be a lot easier if there is a device that could measure an individual's degree of cuteness, unfortunately, there is no foreseeable future for such device to work properly if it is based on preference. Which means voting polls will suffice for now. :P

How can a guy be cute? If that guy already have the looks, then... All that remains is to become someone a little bit nicer. *Smiles*

If OP want's to be "cute" to win over a girl. Might I advise to leave your attempts at attraction, and instead try the path to domination? Women are a Conquest. and In the great words of Voltaire, "It is not enough to conquer; one must learn to seduce."